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T(n,n-2), where T is the array in A026148.
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%I #7 Jun 23 2013 11:11:21

%S 1,2,7,20,60,176,517,1512,4415,12870,37477,109044,317109,921870,

%T 2679510,7787904,22636503,65804638,191332945,556456060,1618813834,

%U 4710869108,13713658368,39935698400,116340344575,339050396646,988474306017

%N T(n,n-2), where T is the array in A026148.

%F Conjecture: -(n+8)*(n-118)*a(n) +(-n^2-561*n-2878)*a(n-1) +2*(38*n^2+203*n-1070)*a(n-2) +2*(-116*n^2+781*n+2493)*a(n-3) +(13*n^2-1012*n+3888)*a(n-4) +3*(107*n-423)*(n-4)*a(n-5)=0. - _R. J. Mathar_, Jun 23 2013

%Y First differences of A026327.

%K nonn

%O 2,2

%A _Clark Kimberling_